Call annunciator



HqF. PLUMB.Y

CALL ANNUNCIATOR.

APPLICATION FILED OCT. I5, I9I8.

Patented'June 6, 1922.

N UNITED STATES eATENT OFFICE.

' HERBERT r. PLUMB, or nnuiifiii'ntifnn, animieren, CANADA.

CALL ANNUNCIATOR.

To all whom t may concern Be it known that LHERBERT F. PLUME, a subject of the King of England, residing at Drumheller, in the Province of Alberta and country of Canada, have invented certain new and useful Improvements in a Call Annunciator, of which the following isa specication.

This invention relates to an improved call annunciatory or electrical indicator designed to give a visual as well as an audiblesignal, so that a person kwho has heard asignal can positively ascertain the exact signal which is given, thereby ensuring accurate carrying out or" the order for which the signal stands.

A further object oi' the invention is to provide a call annunciator or electrical indicator of this character, which is electrically operated and designed Jfor use in mines to indicate when an elevator is to be hoisted or calls for coal, men oi' otherwise, or which can quite novel and capable of being released so that it is returned to an inoperative position after each signal is given, thereby permitting its immediate re-use and avoiding errors which might otherwise occur.

With the above objects and others in view as will appear as the description proceeds, the invention comprises the novel features of construction, combinations of elements and arrangement of parts which will be more fully described in the following speciiication and embodied in the claim which is appended hereto.

Reference is had to the accompanying` drawing forming a part of this application, wherein similar reference characters will refer to corresponding parts throughout the several views, in which- Figure 1 is a diagrammatic elevation showing my improved call annunciator or electrical indicator', and,

Figure 2 is an enlarged vertical view transversely of the device and showing the operative parts.

Figure 3 is a sectional view taken on the line 3 3 oit Fig. 2. i

Referring to the drawings in detail, my

`improved call annunciator or electrical indicator comprises a base or baclrboard 1() preferably of non-conducting material and `Specification of Letters latent. Patented June 6, 1922.

Application filed October 15, 1918. Serial No. 258,177.

is suitably mounted or supported at the` place where it is desired to give the signal. Slidably supported thereon as by means of guide straps 11, is a vertical indicator `bar 12 having formed at the upper end thereof, a pointer 13 designed-to cooperate with a series ot indications 14; equally spaced apart and marked as shown at 15, to indicate the number oibells or annunciations given audibly as willbe hereinafterset i'orth. rlhe bar 12 is provided upon its outer facewith a series olratchet teeth 16, the upper faces of which are beveled downwardly as indicated at 17, thereby providing substantially horizontally positioned lower *faces 18 to` facilitate the,

raising and lowering of the bar as will be 'further explained.

Mounted on the base 10 upon a horizontal and slightly inclined pivot 19 for movementv in an inclined plane, is a detent 20 adjacent at the i'ree end of which there is positioned a pair of electro-magnets 21, the detent serving as an armature and being of such material as to be magnetically effected so as to be drawn towai'dthe magnets when the latn tei are energized so as to cause the detent to engage over one of the beveled rfaces 17 and beneath the adjacent face 18 of a tooth 16 to, raise the bar 12 one step at a time. This part of' the mechanism serves to operate they visual. signal in conjunction with an electrical circuit for controlling the magnets, as will be further explained.

The releasing mechanism for the slidable bar 12 to permit 'the same to be lowered and returned to its normal, initial position comprises a spring catch 22 which is secured to the base 10 as at 22a and coiled in substan` tially; U-shaped form so that the iree end 22b may engage beneath one of the teeth 18 to be withdrawn therefrom. Mounted on the base 10 and to one side ora the spring catch, l have provided an electro-magnet spring support 23 carrying a pair of electroanag nets 2a positioned so that when energized, they will attract the armature or bar 25 pivoted or hinged at 25a to said base and suitably connected to and near the iiree end oit the spring catch 22 whereby the 'same may be released from the slidable bar and permit said bar to drop by gravity to its initial position, the pointer 13 of said bar thus returning to the bottom of the scale as is readily understood and clearly shown by Fig. 2 of the drawing.

Ahe electro-magnets or solenoids 21 are 2 ifiieleee connected in circuit With e, source of electriearl energy Such :1S storage batteries or the like, indicated at 26, through the n'iediuin of a conductor 27, leading to one pole oit the Source of energy, the eireui't being` Completed. through u Conductor 28 with en interpoeed push button or other switch 29. IConnected in the eireuit with the electro-magnets. 2l is en audible signal or bell 30, :t branch conductor 3l leerling` troin the conductor 2T to one pole o'ii' the bell or binding post thereolf, and L brunch conductor leading lron'i `the other binding poet to the eoiniuetor ifo eo that upon the eiviteh beingY eloeed, the eircuit will be eloeed through the eleetrohiugnets 21 to energize the seine und thereby attract the armature 'foi-mir g detent 2O to raise the bar l2 u Single teeth and corre spondingly move 'the indicator pointer lo along` the indieetione l5 'to visually indicate the cell, Weil are euijiibly i'ifidieiite 'the seine.

rThe releaeing device ie connected iin 'the circuit with bzitteriee` to be independently operated for releasing the bar to perinit it to be dropped to Vinitial or noriinel poeition :ind for this purpose the eleetro-in:ignote or ziolenoids @et are connected by a. ronduetor 32S with the Source of eleetrieel energy :it one Side and through e eonduetor 5ft with the o pH posite pole oit the buttery or source olf eleetrieel energy. rThe eonchnftor 5f-l :ie provided with un interpoeed p ush button or other ty pe of switch us it '55 which upon being ulm-red, will eloee the cireuit through the batteries; end nmgnete Qfl to detreet the spring euteh 22 by the energizution olf lthe eole'iioide, thereby releasing the brrr b y withdrtrwing)4 'the esrteh :troni the teeth thereon. rlhe bei: 'will be eepuble of doivl'nvztrd movement in; longI as the euteh held witl'idrmvn, but .it if; to be underetooi'l tlnit the bzrr will be eieveted one step :it u. time earch time the eireu it through the ewiteh 29 eloeed to .ennui-- taneously operate the vieuzil and znidible signals thereby impartingv :t etep b v step movement to the .indicator or pointer 13 eeeordiug to 'the iudiee'tione or nnrriiings indiented it ifiend l5, as compared with the signal deeired to be gi ven 'tor e pnrtieuler purpose. For convenience, e chart inzrv be urrzufigged adjacentto the -zeil :1nd receivii'ig ends eo es to ensure correct sendingi und ne ewerinl Uil eig-nele. ln this Viry, when :L signal in given, should rr person heer the sinne but not be eure oit the number o'if eig;- nzils given, 'the vielnri imnuneiator een be reeorted to. it ie also 'to be underetood that the detent 2() when released. will permit :tree downward Inovenient ol the bur upon dieten- ;i=.p;enient or the ein-ing` eufteh 2,1?, es er" piiined, :iinee the deteut xii) will be out ol the pofth of the teeth lo ot the ber. The devine ,ie eepeeizrlly adapted lor uee in mines, whine eode sinailing by bell ie ,generally employed.

ll'irviug thugy fully described nij invention, 'wh-,it l Chinn are new, und deeire to :feeure by iieitire Patent el? the United States, ie:

fr mail :innimonitor eonrprieiu :i ber, :in insulated bziee on which mid our ie eliidublv ported lior vertical movement, Suid bau' hitting; teeth end irovideifi with o. pointer, ipiuzerl indie/zitione` on seid buse with which avid pointer cooperates, :i deent engfiigeribie 'with 4the teeth olf the bar to reise the saine one eiep und normally diiiei'igfziifed tb( eti-oni, :an electrouuogne't Vior mtuzitillg; he (teten, n. .eprilug euieh havingA one end :iiitzufhed 'to the buse and itsy oppor-1i te i'ree end engaging (he teeth oi' Suid ber, un iii-nurture inounted on :seid spring' nerxr the l'ree end thereof, und :L :fieeond nnignet :xitazehed to Huid operating with rimini, :ufnniture to u' the Yi'ree end of the fiorini; from en: if.

hereto. 

